8T49N240-990NLGI8

Overview

The 8T49N240-990NLGI8 is a jitter attenuator clock synthesizer from Renesas Electronics, part of the FemtoClock series. It features four LVPECL outputs with a maximum output frequency of 867 MHz and supports input frequencies up to 875 MHz. The device operates on a single 2.375 V to 3.465 V supply and is housed in a 40-pin VFQFN package. Designed for low-power applications, it draws approximately 40 mA. The component is rated for industrial temperatures ranging from -40°C to +85°C.

Feature Summary

• Four-output LVPECL clock generation with jitter attenuation capabilities
• Maximum output frequency of 867 MHz supporting high-speed digital interfaces
• Single 3.3 V nominal supply voltage (2.375 V to 3.465 V range)
• Industrial temperature rating (-40°C to +85°C) in a compact 40-VFQFN package

Applications

• High-performance computing systems requiring precise clock distribution
• Telecommunications infrastructure equipment
• Data center networking hardware
• Test and measurement instruments

Procurement Notes

This component is currently listed as limited supply or not actively stocked by major distributors such as Mouser. Verification of availability through direct manufacturer channels or authorized partners is required before procurement planning. Check for end-of-life notices or alternative sourcing options due to potential discontinuation status.

Selection Notes

Select this model when four differential LVPECL outputs are required with integrated jitter cleaning. Ensure the design accommodates the 40-VFQFN thermal pad requirements. Verify that the system power budget aligns with the ~40 mA operating current. Confirm compatibility with the 867 MHz maximum frequency limit for the target application.

Part Context

The 8T49N240 belongs to Renesas's FemtoClock NG family of programmable clock generators. This specific suffix indicates a fixed-frequency configuration optimized for jitter attenuation. It serves as a replacement for legacy IDT clock synthesizers in high-speed data path designs where phase noise performance is critical.

Replacement Considerations

Verify pin-to-pin compatibility with existing designs if substituting. Consult Renesas documentation for equivalent models within the 8T49N240 series or newer FemtoClock generations that offer updated packaging or enhanced specifications.